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mbtowc(3): set errno to EILSEQ if an incomplete character is passed.

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According to POSIX, The mbtowc() function shall fail if:
[EILSEQ] An invalid character sequence is detected.

Reviewed by:		bapt
Differential Revision:	https://reviews.freebsd.org/D5496

Obtained from:	OpenBSD (Ingo Schwarze)
MFC after:	1 month
This commit is contained in:
Pedro F. Giffuni 2016-03-01 19:15:34 +00:00
parent f3215338ef
commit 45256214eb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=296278
1 changed files with 9 additions and 2 deletions
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11
lib/libc/locale/mbtowc.c
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@ -32,6 +32,7 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <errno.h>
#include <stdlib.h>
#include <wchar.h>
#include "mblocal.h"
@ -49,9 +50,15 @@ mbtowc_l(wchar_t * __restrict pwc, const char * __restrict s, size_t n, locale_t
return (0);
}
rval = XLOCALE_CTYPE(locale)->__mbrtowc(pwc, s, n, &locale->mbtowc);
if (rval == (size_t)-1 || rval == (size_t)-2)
switch (rval) {
case (size_t)-2:
errno = EILSEQ;
/* FALLTHROUGH */
case (size_t)-1:
return (-1);
return ((int)rval);
default:
return ((int)rval);
}
}
int
mbtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n)